Hi Satish,
You do not give the reason for the interview. Therefore I cannot give specific advice.
However, in general terms the following should help your friend prepare for a successful interview:
1) Ensure you have all relevant documents that you might need. If in doubt take the documents anyway, better that they are not required rather than not having them.
2) Arrive early and speak to the clerk or court staff and ask how the Judge(s) like to be addressed. The court staff will not approach you, you must approach them. If you do not get the opportunity to speak to the staff, then address the Judge as Your Honor.
3) Speak to the Judge only when you are spoken to, this shows respect.
4) Always use a polite tone and reserved body language. Do not wave your hands about. Do not use any phases that criticize the Judge or any other official. Do not use words that can be interpreted as cursing or threatening. Maintain your composure, if you start to get upset, angry or lose your temper, ask the Judge for a brief recess. Take a few minutes to gather your emotions outside the court. Remember a Judge can hold you in contempt, meaning they can give you a fine or even put you in jail for speaking disrespectfully. However, even if they do not then your testimony will be tarnished.
5) No matter what happens, wait until the Judge is finished talking before you speak. The Judge will not tolerate you speaking over him (or anyone else) or interrupting.
6) Make eye contact with the Judge at all times, this tells him that you are paying attention to what he is saying.
7) When you speak, you should stand up and only sit down when you have finished, this shows respect and also lets the Judge know when you are done speaking. The Judge may direct you to keep seated while you are talking.
8) When you are totally finished speaking with nothing more to add or at the end of the interview thank the Judge for listening.
9) When you are not speaking, sit quietly and act respectful.
10) Do not do anything that might be seen as disrespectful, either to the Judge, or any one else in the room. Such as eye rolling, making comments or gestures.
I hope the above helps.
Regards,
Harsh